Income taxes (Deferred Assets and Liabilities) (Details) - USD ($) $ in Thousands	Jul. 03, 2021	Jun. 27, 2020
Deferred tax assets:
Federal, state and foreign net operating loss carry-forwards	$ 282,882	$ 237,200
Depreciation and amortization	17,333	16,585
Inventories valuation	25,336	35,509
Operating lease liabilities	69,759	67,814
Receivables valuation	13,757	11,868
Various accrued liabilities and other	62,082	102,298
Deferred tax assets, gross	471,149	471,274
Less - valuation allowance	(293,569)	(283,721)
Deferred tax assets, net	177,580	187,553
Deferred tax liabilities:
Operating lease assets	(68,135)	(66,316)
Net deferred tax assets	$ 109,445	$ 121,237